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A series of polymeric complexes were prepared from Fe2+, Co2+ or Ni2+ and poly(Schiff base) (DAPcIPA), which was obtained by polycondensation of 5,6-diamino-1,10-phenanthroline (DAP) with isophthalaldehyde (IPA). The structures of the polymer and the polymeric complexes were characterized by IR, 1H-NMR and elemental analysis. The magnetic behavior of these complexes was measured as a function of magnetic field strength (0-3.98 × 106 A/m) at 5 K and as a function of temperature (5-300 K) at a magnetic field strength of 2.39 × 106 A/m. Experimental results show that DAPcIPA-Ni2+, DAPcIPA-Co2+ are soft ferromagnets while DAPcIPA-Fe2+ exhibits features of an antiferromagnet.